import { login, logout, getInfo } from '@/api/auth'
import { getToken, setToken, removeToken } from '@/utils/auth'
import router, { resetRouter } from '@/router'

const state = {
  token: getToken()
  , name: ''
  , avatar: ''
  , introduction: ''
  , roles: []
}

const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token
  }
  , SET_INTRODUCTION: (state, introduction) => {
    state.introduction = introduction
  }
  , SET_NAME: (state, name) => {
    state.name = name
  }
  , SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  }
  , SET_ROLES: (state, roles) => {
    state.roles = roles
  }
}

const actions = {
  // user login
  login({ commit }, userInfo) {
    return new Promise((resolve, reject) => {
      login(userInfo).then(response => {
        const { token } = response
        commit('SET_TOKEN', token)
        setToken(token)
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  }

  // get user info
  , getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const { data } = response

        if (!data) {
          reject('Verification failed, please Login again.')
        }

        const { roles, nick_name, avatar } = data

        commit('SET_ROLES', roles)
        commit('SET_NAME', nick_name)
        commit('SET_AVATAR', avatar)
        commit('SET_INTRODUCTION', nick_name)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  }

  // 安全退出
  , logout({ commit, state, dispatch }) {
    return new Promise((resolve, reject) => {
      logout(state.token).then(() => {
        commit('SET_TOKEN', '')
        commit('SET_ROLES', [])
        removeToken()
        resetRouter()

        // reset visited views and cached views
        // to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2485
        dispatch('tagsView/delAllViews', null, { root: true })

        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  }

  // remove token
  , resetToken({ commit }) {
    return new Promise(resolve => {
      commit('SET_TOKEN', '')
      commit('SET_ROLES', [])
      removeToken()
      resolve()
    })
  }

  // dynamically modify permissions
  , async changeRoles({ commit, dispatch }, role) {
    const token = role + '-token'

    commit('SET_TOKEN', token)
    setToken(token)

    const { roles } = await dispatch('getInfo')

    resetRouter()

    // generate accessible routes map based on roles
    const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })
    // dynamically add accessible routes
    router.addRoutes(accessRoutes)

    // reset visited views and cached views
    dispatch('tagsView/delAllViews', null, { root: true })
  }
}

export default {
  namespaced: true
  , state
  , mutations
  , actions
}
